I don't combine both. The Adsense takes visitors away from my site. I don't want them to leave unless they are going to MY advertiser. I've tested this. You make more money with Adsense on a Product based commission junction site. If you are using banners from CJ then mixing Adsense and CJ Banners work fine, but not if you are selling PRODUCTS.
It depends on your programs. Don't give your visitors a pipeline to leave your site, giving a sale to Adsense where your campaign may net a much greater commission. Take care & Best.